I find the easiest way to select single surfaces is to CTRL-Left click on the 3D window. To select more than one surface, use SHIFT-CTRL-left click on each additional surface.
Vertices are a little more difficult because it's sometimes hard to determine where on the 3D model the vertice exists. So I click on the vertice in one of the 2D models so it will be highlighted on the 3D model. If only one is selected, then great. If not, then I can CTRL-left click on the vertice I wish to keep.
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